0 reads0 ratings0 helpful
In the arithmetic progression (3,9,15,21,\ldots), what is the sum of (a) and (d)?
Advertisement
Answer and explanation
Correct answer: \(9\)
The first term of the given AP is \(a=3\). Its common difference is \(d=9-3=6\). Hence, \(a+d=3+6=9\). Note that \(6\) is only the common difference, not the required sum. Exam tip: Find \(d\) by subtracting a term from the term immediately after it.
Frequently asked questions
What is the correct answer to this question?
\(9\)
Why is this the correct answer?
The first term of the given AP is \(a=3\). Its common difference is \(d=9-3=6\). Hence, \(a+d=3+6=9\). Note that \(6\) is only the common difference, not the required sum. Exam tip: Find \(d\) by subtracting a term from the term immediately after it.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Introduction to APs and common difference..
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
Advertisement